1、Designation: D7673 10Standard Specification forHalon 1211, Bromochlorodifluoromethane (CF2BrCl)1This standard is issued under the fixed designation D7673; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers the requirements for Halon1
3、211 as a fire-fighting medium.1.2 This specification does not address the fire-fightingequipment or hardware that employs Halon 1211 or theconditions of employing such equipment (for example, hand-helds, fixed installations, etc.).1.3 This specification does not address the storage ortransportation
4、of Halon 1211. Storage, handling, and transpor-tation issues may be addressed in future ASTM standards.1.4 The values stated in both inch-pound and SI units are tobe regarded separately as the standard. The values given inparentheses are for information only.1.5 The following safety hazards caveat p
5、ertains only to thetest methods portion, Section 6, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the a
6、pplicability of regulatory limita-tions prior to use. Specific hazards statements are given in 4.5.2. Referenced Documents2.1 ASTM Standards:2D2108 Test Method for Color of Halogenated OrganicSolvents and Their Admixtures (Platinum-Cobalt Scale)2.2 AHRI Standards:32008 Appendix C for Analytical Proc
7、edures for AHRIStandard 700-20062.3 ISO Standards:4ISO 3427 Gaseous Halogenated Hydrocarbons (LiquefiedGases) Taking of a Sample2.4 U.S. Governmental Standards:5CFR Title 49, Part 172.101 Tables of Hazardous Materialsand Special ProvisionsCFR Title 49, Part 172 Subpart D Marking Requirements ofPacka
8、ging for Transportation3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Halon 1211the halogenated hydrocarbon compoundBromochlorodifluoromethane used as a fire extinguishing me-dium.3.1.1.1 DiscussionThe halon terminology system pro-vides a convenient means to reference halogen
9、ated hydrocar-bon fire extinguishants. Halogenated hydrocarbons are acyclicsaturated hydrocarbons in which one or more of the hydrogenatoms have been replaced by atoms from the halogen series(that is, fluorine, chlorine, bromine, and iodine). By definition,the first digit of the halon numbering syst
10、em represents thenumber of carbon atoms in the compound molecule; the seconddigit, the number of fluorine atoms; the third digit, the numberof chlorine atoms; the fourth digit, the number of bromineatoms; and the fifth digit, the number of iodine atoms. Trailingzeros are not expressed. Unaccounted f
11、or valence requirementsare assumed to be hydrogen atoms.number of hydrogen atoms 5number of carbon atoms 3 2!12!2sum of halogen atoms!# (1)For example,bromochlorodifluoromethane 2 CF2BrCl 2 Halon 1211 (2)3.1.2 non-condensable gasesnon-condensable gases con-sist primarily of air (nitrogen, oxygen) ac
12、cumulated in thevapor phase of a liquefied compressed gas where the solubilityof air in the liquid phase is extremely low and air is notsignificant as a liquid phase contaminant. Non-condensablegases are in some instances termed non-absorbable gases.4. Material Requirements4.1 Type IMixtures of Halo
13、n 1211 and Nitrogen:1This specification is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents , and is the directresponsibility of Subcommittee D26.09 on Fire Extinguishing Agents.Current edition approved Nov. 1, 2010. Published November 2010. D
14、OI:10.1520/D7673-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Air-Conditioning, Heating
15、, and Refrigeration Institute, 2111Wilson Blvd., Suite 500, Arlington, VA 22201.4Available from American National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.5Available from Superintendent of Documents, U.S. Government PrintingOffice, Washington, DC 20036.1Copyright ASTM Inter
16、national, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.1 The nitrogen (N2) partial pressure shall be such thatthe safe working pressure of the receiving vessel is notexceeded. To prevent excessive pressure, the fill density ofHalon 1211 within a container s
17、hould not exceed that needed toachieve complete filling of the container at the maximumenvisaged storage temperature. For example, for a U.S. DOT4W260 cylinder, the nitrogen partial pressure shall not exceed129 psig at 70F (9.9 bar at 21C) for a 100 lb/ft3(1602 kg/m3)fill density, which yields a tot
18、al pressure of 150 psig at 70F(11.4 bar at 21C). For this example, the safe working pressureof the 4BW260 cylinder is not exceeded for temperaturesbelow 55C (131F).4.1.2 Halon 1211 shall conform to the requirements pre-scribed in Table 1 when tested by the appropriate test meth-od(s) listed in Secti
19、on 6.4.1.3 When a material analysis is required, by agreementbetween the purchaser and the supplier, the total pressure in theHalon 1211 container, partial pressure of the N2, the fill densityof the Halon 1211 within the container, and the maximum safestorage temperature shall be part of the materia
20、l analysis(certification). The pressure shall be reported in pound-forceper square inch gauge (preferred) or bar. The fill density shallbe reported in pounds per cubic foot at 70F (preferred) orkilograms per cubic metre at 21C. The maximum safe storagetemperature of the Halon 1211 container shall be
21、 reported indegrees Fahrenheit (preferred) or in degrees Celsius and shallconform to applicable regulations for the Halon 1211 containerdesign and use.4.2 Type IIHalon 1211 shall conform to the requirementsof Type I, as listed in 4.1, and shall contain no more than 1.5 %by volume non-condensable gas
22、es in the vapor phase, ex-pressed as air when tested by the appropriate test method(s)listed in Section 6.4.3 By agreement between the purchaser and the supplier,analysis may be required and limits established for elements orcompounds not specified in Table 1.4.4 Unless otherwise specified, Type I i
23、s assumed.4.5 WarningExposure to concentrations of Halon 1211 inexcess of 1.0 % by volume in air during periods of elevatedadrenaline could produce cardiac arrhythmia in some person-nel.5. Sampling5.1 Samples of Halon 1211 shall be taken from the liquid orvapor phase as appropriate. Samples of Halon
24、 1211, taken fromthe liquid phase, shall be taken from filled containers inaccordance with the method specified in ISO 3427 or themethod specified in 2008 Appendix C for Analytical Proce-dures for AHRI Standard 700-2006, Part 7.5.1.1 The sampling vessel shall be capable of safely resist-ing the vapo
25、r pressure of the sample at the highest temperaturethat could be encountered during handling, storage, or trans-port.5.2 The Halon 1211 selected in accordance with 5.1 shall betested for quality conformance in accordance with Section 6.The presence of one or more defects shall be cause forrejection.
26、6. Test Methods6.1 Purity:6.1.1 Determine the purity by gas chromatography in accor-dance with the technique described in 6.1.2-6.1.5 or by gaschromatography/mass spectrometry (GC/MS) in accordancewith 6.2.2-6.2.5.6.1.1.1 Prior to sample introduction, a standardization of theGC must be performed usi
27、ng a known bromochlorodifluo-romethane purity standard.6.1.2 ApparatusThe following special apparatus is re-quired to determine the percent of Halon 1211 by GC:6.1.2.1 Gas Chromatograph System (GC System), equippedwith a flame ionization detector (FID), capillary column splitinjector, subambient (li
28、quid nitrogen) cooling valve and anelectronic integrator or suitable computer data gathering andreduction system.6.1.2.2 Chromatographic Column210 m (connect the twocolumns below together with the first column end attached tothe injection port):(a) 105 m RTx-1701 (14 % cyanopropylphenyl-86 %methylpo
29、lysiloxane), 0.25 mm, 1m.(b) 105 m RTx-200 (5 % diphenyl-95 % dimethyl polysi-loxane), 0.25 mm, 1m.The two columns are attached together, with the first(column a) attached to the injection port of the GC system.Columns are available from several chromatographic supplyvendors.6.1.2.3 Sample Introduct
30、ionTake sample from the liquidphase employing the procedure described in 5.1 of thisspecification; using a standard gas-tight syringe introduce thesample into the GC.6.1.3 ReagentsThe carrier gas shall be a chromatographicgrade of helium.6.1.4 Temperature Programming:6.1.4.1 Install the column in th
31、e gas chromatograph andadjust the oven temperature to 20C. Inject the sample andhold the column oven at 20C for 21 min, then program thetemperature to rise 15C per min to a maximum of 165C, thenposthold for 20 min before recycling.6.1.5 Calculation:6.1.5.1 Calculate weight percent and convert to mol
32、e per-cent Halon 1211 as follows:Wi5Ai3 RRFi3 100(Ai3 RRFi#(3)where:Wi= weight percent of component, i,Ai= peak area of component, i,TABLE 1 RequirementsProperty RequirementHalon 1211 purity, %, by mol, min 99.0Acidity, ppm by mass, max 3.0Water content, ppm by mass, max 20Nonvolatile residue, % by
33、weight, max 0.02Suspended matter or sediment None visibleColor Report valueD7673 102RRFi= Relative Response Factor for component,i, and(Ai3 RRFi = sum of all component peak areas timestheir respective relative response factors.6.1.5.2 For ASTM specification, the results must be con-verted to and rep
34、orted in mole percentages. Convert individualimpurities from Wt % to Mole % as follows:Mole %i5 100 3 Wi/Mi!/(Wi/Mi# (4)where:Mole %i = mole percent of component, i,Wi= weight percent of component, i,Mi= molecular weight of component, i, and(WiMi = sum of all component weights divided by theirrespec
35、tive molecular weights.NOTE 1The GC method described in 6.1.2-6.1.5 may not detectcertain impurities, for example, impurities which may elute within or nearthe relatively large Halon 1211 peak. If other tests indicate the presence ofunidentified impurities, then the gas chromatography/mass spectrome
36、try(GC/MS) method described in 6.2.2-6.2.5 is recommended.6.2 Purity by BC/MS:6.2.1 Determine the purity by gas chromatography/massspectroscopy (GC/MS) in accordance with the technique de-scribed in 6.2.2-6.2.5.6.2.1.1 Prior to sample introduction, a standardization of theGC/MS must be performed usi
37、ng a known bromochlorodifluo-romethane purity standard.6.2.2 ApparatusThe following special apparatus is re-quired to determine the percent of Halon 1211:6.2.2.1 Gas Chromatography/Mass Spectrometry System(GC/MS System) and an electronic integrator or suitablecomputer data gathering and reduction sy
38、stem.6.2.2.2 Chromatographic Column, 344 ft (105 m) Rtxt-1capillary column, 0.01 in. (0.25 mm) internal diameter, station-ary film thickness of approximately 1 m. (Column is availablefrom several chromatographic supply vendors.)6.2.2.3 Sample IntroductionTake sample from the liquidphase employing th
39、e procedure described in 5.1 of thisspecification. Using a standard gas-tight syringe introduce thesample into the GC/MS.6.2.3 ReagentsThe carrier gas shall be a chromatographicgrade of helium.6.2.4 Temperature Programming:6.2.4.1 Install the column in the gas chromatograph/massspectrometer and adju
40、st the oven temperature to -30C. Injectthe sample and hold the column oven at -30C for 13 min, thenprogram the temperature to rise 10C per min to a maximum of200C, then posthold for 10 min before recycling.6.2.5 Calculation:6.2.5.1 Calculate weight percent and convert to mole per-cent Halon 1211 as
41、follows:Wi5Ai3 RRFi3 100(Ai3 RRFi#(5)where:Wi= weight percent of component, i,Ai= peak area of component, i,RRFi= Relative Response Factor for component,i, and(Ai3 RRFi = sum of all component peak areas timestheir respective relative response factors.6.2.5.2 For ASTM specifications, the results must
42、 be con-verted to and reported in mole percentages. Convert individualimpurities from Wt % to Mole % as follows:Mole %i5 100 3 Wi/Mi!/(Wi/Mi# (6)where:Mole %i= mole percent of component, i,Wi= weight percent of component, i,Mi= molecular weight of component, i, and(Wi/Mi = sum of all component weigh
43、ts divided by theirrespective molecular weights.6.3 AcidityDetermine acidity with the method specified in2008 Appendix C to AHRI Standard 700-2006, Part 1.6.4 Water ContentDetermine water content with themethod specified in 2008 Appendix C to AHRI Standard700-2006, Part 2.6.5 Nonvolatile ResidueDete
44、rmine nonvolatile residuewith the method specified in 2008 Appendix C to AHRIStandard 700-2006, Part 3.6.6 Non-condensable gasesDetermine non-condensablegases with the method specified in 2008 Appendix C to AHRIStandard 700-2006, Part 4.6.7 Suspended Matter and SedimentWhile performing thenonvolatil
45、e residue analysis, examine visually for any sus-pended matter or sediment. Observation of any suspendedmatter or sediment shall constitute failure of this test.6.8 Determine color with the method specified in TestMethod D2108. Results should be used as an indicator of othercontamination, and must h
46、ave a description of what is observedas well as the value recorded on the final report. Results fromthe color test that are inconsistent with outcome from otherrequired tests will be the basis for repeat testing to validate thetest results of specific properties.7. Container, Packaging, and Package
47、Marking7.1 Containers used for shipping and storage of Halon 1211conforming to this specification shall be marked in accordanceto Code of Federal Regulations (CFR) Title 49, Part 172Subpart D “Marking.” The proper shipping name for ASTMD7673 Type II (pure) Halon 1211 is “Chlorodifluorobro-momethane
48、(Refrigerant Gas R 12B1),” UN 1974, HazardClass 2.2 (nonflammable gas). The proper shipping name fornitrogen superpressurized Halon 1211 is “Liquefied Gas,nonflammable charged with nitrogen,” UN1058, Hazard Class2.2 (nonflammable gas). In addition to DOT requirements,containers must be marked with t
49、he following information as aminimum:7.1.1 Suppliers name and address,7.1.2 Halon 1211 (Bromochlorodifluoromethane),7.1.3 Statement that material conforms to SpecificationD7673, and7.1.4 For storage or transportation within the United States,a warning label shall be affixed to the container conformingD7673 103with United States Environmental Protection Agency require-ments, in accordance with Section 611 of the Clean Air Act, asamended.7.2 Extreme Elevated Temperature ConsiderationsWhenType I or Type II mixtures of Halon
